Retailers have shed more than 100,000 jobs in the past six months as many of them fight for survival in a mobile landscape, according to the U.S. Bureau of Labor Statistics.

The continuing shift from brick-and-mortar stores to online commerce is forcing a wave of empty storefronts, including hundreds across Pennsylvania.

While commercial retailers strive to fill those spaces, consumers shopping on smartphones are creating a demand for warehouses and fulfillment centers. Economists say nearly 400,000 e-commerce jobs have been created in the last 10 years, mostly due to Amazon’s growth.

Amazon has several fulfillment centers in Pennsylvania, including locally in Cumberland and York counties. The video above gives an inside look at the fulfillment center in Carlisle.

Photo by Michael Dwyer, Associated Press

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